Behçet's disease.

Behçet's disease is a chronic, relapsing vasculitis that can affect most organ systems. The prevalence varies geographically, and the disease is more common in countries along the ancient Silk Road, including Italy, Turkey, Israel, Saudi Arabia, Iran, China, Korea and Japan. Behçet's is more common in men than in women, and typically affects young adults. The classic finding in Behçet's patients is the presence of recurrent mucocutaneous ulcers, and oral aphthous ulcerations are usually the initial symptom. Other manifestations include genital ulcers, skin lesions, vascular, neurological, articular, and ocular disease. The disease can affect the anterior and/or posterior segments of the eye, and the main manifestations include iridocyclitis, hypopyon, mild to moderate vitreitis, retinal vasculitis and occlusion, optic disc hyperemia, and macular edema. There is no pathognomonic laboratory test in Behçet's disease, and the diagnosis is based in systemic and ocular clinical findings. Treatment of ocular Behçet is based in corticosteroids and immunosuppressive agents, to suppress acute inflammation and reduce its recurrence frequency. Ocular lesions may improve with immunosuppressive therapy, but usually are not fully reversible, and generally progress over time. The prognosis of anterior uveitis is usually good, but patients with posterior lesions tend to have some degree of visual loss, even with adequate treatment.